Dell Force10 E1200i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 999
System Time and Date, Network Time Protocol
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56 System Time and Date c Chapter 56, System Time and Date settings, and Network Time Protocol are supported on platforms: e s System times and dates can be set and maintained through the Network Time Protocol (NTP). They are also set through FTOS CLIs and hardware settings. On E-Series TeraScale, C-Series and S-Series, the switch can act only as a client to an NTP clock host. On the E-Series ExaScale, the switch can act as a client to an NTP clock host or as a server to other downstream clients. This chapter includes the following sections: • Network Time Protocol • Protocol Overview • Implementation Information • Configuring Network Time Protocol • FTOS Time and Date • Configuring time and date settings • Set daylight savings time Network Time Protocol Network Time Protocol (NTP) synchronizes timekeeping among a set of distributed time servers and clients. The protocol also coordinates time distribution in a large, diverse network with a variety of interfaces. In NTP, servers maintain the time and NTP clients synchronize with a time-serving host. NTP clients choose from among several NTP servers to determine which offers the best available source of time and the most reliable transmission of information. NTP is a fault-tolerant protocol that will automatically select the best of several available time sources to synchronize to. Multiple candidates can be combined to minimize the accumulated error. Temporarily or permanently insane time sources will be detected and avoided. Dell Force10 recommends configuring NTP for the most accurate time. In FTOS, other time sources can be configured (the hardware clock and the software clock). System Time and Date | 999
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